Re: RegionPlot3d under sampling plot points?

*To*: mathgroup at smc.vnet.net*Subject*: [mg99455] Re: RegionPlot3d under sampling plot points?*From*: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>*Date*: Wed, 6 May 2009 05:22:49 -0400 (EDT)*Organization*: Uni Leipzig*References*: <gtp1g4$k4c$1@smc.vnet.net>*Reply-to*: kuska at informatik.uni-leipzig.de

Hi, PlotPoints -> {32, 32, 32}*{1728,1,1728} may help, but will take a bit longer. Regards Jens gramathon wrote: > Hi All, > I am new to Mathematica, so apologies ahead of time if this is a silly > problem. I am trying to use RegionPlot3D to plot the following, > RegionPlot3D[ > 2 x(y - 1) <= 2.5 z+ 2 (y - 1) z&& z<= x, {x, 1, > 864000}, {y, 2, 500}, {z, 1, 864000}, PlotStyle -> Orange,PlotPoints- >> 100] > > The problem is I end up getting gaps in regions where I expect none to > exist. > - I tried increasing the PlotPoints.Though that reduces the number of > gaps at first (partly removes the gaps for the higher values of NA and > NP but gaps remain, in the lower values of the two axises) after a > certain number of point >= PlotPoints -> 150the graph ends up looking > completely different with Spikes everywhere and still has gaps which > does not make sense....(I am not sure if this could be due to the > graphics card because the above code is relatively smoother on my less > powerful machine but still has gaps) > - I tried providing different plotpoints to different axises E.g. > PlotPoints-> {111,100,111}... but that did not seem to help either. > - I tried MaxRecursion as well but that does not seem to help in this > case either... > I am completely lost, and have been spending quite a bit of time > trying to search for an answer...WOULD REALLY APPRECIATE it if anyone > could Help > Thanks a bunch GUYS > Version 7 of Mathematica >